Even if it fit, how are the buttons going to work if there is no harness connections for them in the steering column to connect to...you'll have to custom splice in a harness.
Much easier to use an iPod or other device with a custom playlist connected to the line in...are people so 'ADD' now they have to constantly switch stations? It certainly seems that way...
And upgrading to a different steering wheel for the FR-S would usually be something along this path:
...because the factory wheel is still TOO big in diameter for a driving focused sports car.